Improvement in spring weighing-scales



J. V` MATHIVET. Spring Scales.

, Patented Sept. 13, 1870 N.FETERS, PHOYULITMUGRAPNEH. WASHINGTON D C @anni 69Min.

JEAN VICTOR MATHIVET, OF CLEVELAND, OHIO.

Letters Patent No. 107 ,272, dated September 13, 1870.

IMPROVEMENT IN SPRING WEIGHINGSCALES.

The Schedule referred to in these Letters Patent and making part of the same'.

To all whom it may concern:

Be it known that I, JEAN Vieron Ma'ruivn'r, of Cleveland, in the county of Cuyahoga. and State of Ohio, have invented a new and useful Improvement in Spring-Balance or Scales; and I do hereby declare the following to be a full,l clear, and exact description thereof, suicient to enable those skilled in the art to which my invention appertains to fully understand and to make and use the same, reference being had to-the accompanying drawing forming part of this specification.

The nature of this invention relates toan improvement in spring-balances or scales, which indicate weight by an index-pointer, whereby the exact weight of two articles placed on the platform may be indicated at one and the saine time.

This improvement consists in the addition of a loose pointer on the same spindle with the fixed pointer, and countcrpoiscd by aweight, so that it shall stand perpendicular and indicating nothing, but which is capable of being fixed at any time so that it shall turn with the spindle and made to indicate the weight ot a second article on the scales.

In -the drawing- Figure 1 represents a spring-balance with my iniprovement attached.

Figure 2 is a section, showing'the manner of attaching the aforesaid adjustable second pointer.

A is a dial of the ordinary kind, attached to a springbalance, which may be of any of the known forms, and which has attached to the spindle c a fixed pointer,

' a, which spindle is operated by the spring affected by the weight of' ithe article on the platform D.

The end of the spindle cis extended by screwing into itapin, c, which is made slightly tapering, with the largest end next to the spindle.

Fitting on the pin c is the sleeve i of the loose pointer B, which has a counterpoise weight, b.

The object of makingA the pin c tapering is so that, when the sleeve i is pushed onto it, the pointer will be fixed, and" will turn with the spindle; otherwise, whenthe sleeve sets loosely ou the pin, the pointer 'Bwill be caused to stand perpendicular by the counterpoise weight b. The pin c has a head on it or a small pin through it, to prevent the pointer from slipping off.

A small guard, h, is placed on the pointer B over the end of the pin e, which may be used as a handle for pushing or drawing the pointer for tightening and loosening it on the pin.

The operation of this improvement is as follows:

For instance, it is desired to ascertain the weight of some article which must be contained in a vessel, such as butter; thc dish is placed on the platform of the scale or balance,and the fixed pointer indicates its weight, which may be some fractional weight, but the operator need pay no attention to this; he simply fixes the loose pointer now by touching the guagi h, pushing the point-er B tightlyon the pin c, when he may take his dish away, fill it; then by replacing it on th platform the now'iixed pointer B indicates the exac weight of' the contents, thus obviating the' necessity of figuring the difference between the weight of the dish and the aggregate weight ot' both to find the weight of the contents. It is, therefore, perfectly reliable, being bot-h quick and certain.

rEhe fixed pointer (t might be dispensed with ventirely, as'the pointer B can be fixed and used as such in all cases when a single article is to be weighed, and when two are to be weighed, the pointer can be loosened; then, when the dish is on the platform, itmay he fixed, and the contents onlywill then be indited, it being unnecessary to know t-he weight of the dish.

Having thus described my invention,

What I desire to secure by Letters Patent, is-

lhe weighted pointer B b i, so constructed and fitted to the spindle c c that it may retain its vertical position independent of the spindle, and by a simple adjustment, be made to turn therewith, as and f or the purpose described.

JEAN VICTOR MATHIVET.

Witnesses:

GEO. W. TIBBITs, M. GALLAGHER. 

